code: def log_success_event(
      self, kwargs, response_obj, start_time, end_time
  ):
      print(f"On Success")
      self.success = True
      if kwargs.get("stream") == True:
          self.sync_stream_collected_response = response_obj
  
file_path: litellm/litellm/tests/test_custom_logger.py
imports: import sys, os, time, inspect, asyncio, traceback
  import pytest
  from litellm import completion, embedding
  import litellm
  from litellm.integrations.custom_logger import CustomLogger
label_desc: Use image node_id 5 for calling the MyCustomHandler obj's underlying member method code with example usage: obj.log_success_event(kwargs, response_obj, start_time, end_time) without return types